1
|
Therapeutic and Nutraceutical Effects of Polyphenolics from Natural Sources. Molecules 2022; 27:molecules27196225. [PMID: 36234762 PMCID: PMC9572829 DOI: 10.3390/molecules27196225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/14/2022] [Accepted: 09/17/2022] [Indexed: 11/16/2022] Open
Abstract
The prevalence of cardiovascular disease, oxidative stress-related complications, and chronic age-related illnesses is gradually increasing worldwide. Several causes include the ineffectiveness of medicinal treatment therapies, their toxicity, their inability to provide radical solutions in some diseases, and the necessity of multiple drug therapy in certain chronic diseases. It is therefore necessary for alternative treatment methods to be sought. In this review, polyphenols were identified and classified according to their chemical structure, and the sources of these polyphenol molecules are indicated. The cardioprotective, ROS scavenging, anti-aging, anticancer properties of polyphenolic compounds have been demonstrated by the results of many studies, and these natural antioxidant molecules are potential alternative therapeutic agents.
Collapse
|
2
|
Rebbeck R, Ginsburg KS, Ko CY, Fasoli A, Rusch K, Cai GF, Dong X, Thomas DD, Bers DM, Cornea RL. Synergistic FRET assays for drug discovery targeting RyR2 channels. J Mol Cell Cardiol 2022; 168:13-23. [PMID: 35405106 PMCID: PMC10088286 DOI: 10.1016/j.yjmcc.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 03/09/2022] [Accepted: 04/05/2022] [Indexed: 10/18/2022]
Abstract
A key therapeutic target for heart failure and arrhythmia is the deleterious leak through sarcoplasmic reticulum (SR) ryanodine receptor 2 (RyR2) calcium release channels. We have previously developed methods to detect the pathologically leaky state of RyR2 in adult cardiomyocytes by monitoring RyR2 binding to either calmodulin (CaM) or a biosensor peptide (DPc10). Here, we test whether these complementary binding measurements are effective as high-throughput screening (HTS) assays to discover small molecules that target leaky RyR2. Using FRET, we developed and validated HTS procedures under conditions that mimic a pathological state, to screen the library of 1280 pharmaceutically active compounds (LOPAC) for modulators of RyR2 in cardiac SR membrane preparations. Complementary FRET assays with acceptor-labeled CaM and DPc10 were used for Hit prioritization based on the opposing binding properties of CaM vs. DPc10. This approach narrowed the Hit list to one compound, Ro 90-7501, which altered FRET to suggest increased RyR2-CaM binding and decreased DPc10 binding. Follow-up studies revealed that Ro 90-7501 does not detrimentally affect myocyte Ca2+ transients. Moreover, Ro 90-7501 partially inhibits overall Ca2+ leak, as assessed by Ca2+ sparks in permeabilized rat cardiomyocytes. Together, these results demonstrate (1) the effectiveness of our HTS approach where two complementary assays synergize for Hit ranking and (2) a drug discovery process that combines high-throughput, high-precision in vitro structural assays with in situ myocyte assays of the pathologic RyR2 leak. These provide a drug discovery platform compatible with large-scale HTS campaigns, to identify agents that inhibit RyR2 for therapeutic development.
Collapse
Affiliation(s)
- RobynT Rebbeck
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, USA
| | | | - Christopher Y Ko
- Department of Pharmacology, University of California, Davis, CA, USA
| | - Anna Fasoli
- Department of Pharmacology, University of California, Davis, CA, USA
| | - Katherine Rusch
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, USA
| | - George F Cai
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, USA
| | - Xiaoqiong Dong
- Department of Pharmacology, University of California, Davis, CA, USA
| | - David D Thomas
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, USA; Photonic Pharma LLC, Minneapolis, MN, USA
| | - Donald M Bers
- Department of Pharmacology, University of California, Davis, CA, USA
| | - Razvan L Cornea
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, MN, USA; Photonic Pharma LLC, Minneapolis, MN, USA.
| |
Collapse
|
3
|
Resveratrol and Curcumin for Chagas Disease Treatment—A Systematic Review. Pharmaceuticals (Basel) 2022; 15:ph15050609. [PMID: 35631435 PMCID: PMC9143057 DOI: 10.3390/ph15050609] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/03/2022] [Accepted: 05/09/2022] [Indexed: 02/08/2023] Open
Abstract
Chagas disease (CD) is a neglected protozoan infection caused by Trypanosoma cruzi, which affects about 7 million people worldwide. There are two available drugs in therapeutics, however, they lack effectiveness for the chronic stage—characterized mainly by cardiac (i.e., cardiomyopathy) and digestive manifestations (i.e., megaesophagus, megacolon). Due to the involvement of the immuno-inflammatory pathways in the disease’s progress, compounds exhibiting antioxidant and anti-inflammatory activity seem to be effective for controlling some clinical manifestations, mainly in the chronic phase. Resveratrol (RVT) and curcumin (CUR) are natural compounds with potent antioxidant and anti-inflammatory properties and their cardioprotective effect have been proposed to have benefits to treat CD. Such effects could decrease or block the progression of the disease’s severity. The purpose of this systematic review is to analyze the effectiveness of RVT and CUR in animal and clinical research for the treatment of CD. The study was performed according to PRISMA guidelines and it was registered on PROSPERO (CDR42021293495). The results did not find any clinical study, and the animal research was analyzed according to the SYRCLES risk of bias tools and ARRIVE 2.0 guidelines. We found 9 eligible reports in this study. We also discuss the potential RVT and CUR derivatives for the treatment of CD as well.
Collapse
|
4
|
Gao X, Kang X, Lu H, Xue E, Chen R, Pan J, Ma J. Piceatannol suppresses inflammation and promotes apoptosis in rheumatoid arthritis‑fibroblast‑like synoviocytes by inhibiting the NF‑κB and MAPK signaling pathways. Mol Med Rep 2022; 25:180. [PMID: 35322865 PMCID: PMC8972314 DOI: 10.3892/mmr.2022.12696] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/05/2022] [Indexed: 11/09/2022] Open
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease that mainly targets the synovial membrane, thus causing stiffness, deformity and dysfunction of joints. To date, no effective anti-inflammatory treatments are available for RA. Piceatannol (PIC) is a natural derivative of resveratrol, which has been reported to attenuate the inflammatory response. To evaluate the effect of PIC on RA and to determine the underlying molecular target of PIC, both in vitro and in vivo experiments were performed in the present study. A CIA rat model was established to evaluate the therapeutic effects of PIC. TNF-α, IL-1β and IL-6 levels in blood were measured by ELISA. Western blotting, immunofluorescence analysis and reverse transcription-quantitative PCR (RT-qPCR) were used to analyze the expression levels of protein and mRNA. In vitro, RA-fibroblast-like synoviocytes (FLSs) were pretreated with PIC and subsequently stimulated with TNF-α. The results revealed that PIC significantly upregulated the expression levels of proapoptotic proteins such as Bax and cleaved caspase-3. PIC also significantly reduced the production of proinflammatory cytokines, including PGE2, IL-6 and IL-1β, and significantly downregulated the expression of cyclooxygenase-2 at both the mRNA and protein expression levels. Furthermore, PIC downregulated the expression of MMP-3 and MMP-13, which have been found to be highly expressed in the synovium of patients with RA. Mechanistically, PIC was capable of significantly downregulating the expression levels of proteins involved in the NF-κB and MAPK signaling pathways. The results of the in vivo experiments using a rat collagen-induced arthritis model demonstrated that PIC decreased the arthritis score and exerted beneficial effects in cartilage and significantly reduced the expression of MMP-13. In conclusion, the findings of the present study revealed that PIC could suppress the inflammatory response, promote apoptosis, and exert a significant regulatory effect on the NF-κB and MAPK signaling pathways in RA-FLSs. Therefore, PIC may represent a potential drug for the future treatment of RA.
Collapse
Affiliation(s)
- Xuezhong Gao
- Department of Cardiovascular Disease, People's Hospital of Aksu, Aksu, Xinjiang 843000, P.R. China
| | - Xiaodiao Kang
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Hongwei Lu
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Enxing Xue
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Rong Chen
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Jun Pan
- Department of Orthopedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| | - Jianfeng Ma
- Department of Anesthesiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325027, P.R. China
| |
Collapse
|
5
|
Piceatannol Affects Gastric Ulcers Induced by Indomethacin: Association of Antioxidant, Anti-Inflammatory and Angiogenesis Mechanisms in Rats. Life (Basel) 2022; 12:life12030356. [PMID: 35330107 PMCID: PMC8953771 DOI: 10.3390/life12030356] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 12/02/2022] Open
Abstract
One of the major aggressive factors that affect gastric injury is non-steroidal anti-inflammatory drugs (NSAIDs). Indomethacin (Indo) showed higher potentiality in gastric injury over conventional NSAIDs. Piceatannol (PIC) is a natural polyphenolic stilbene that possesses potent antioxidant and anti-inflammatory properties. The gastroprotective properties of PIC have been overlooked previously. Hence, we aim to study gastric injury induced by Indo and the protective action manifested by PIC, as well as to elucidate the likely underlying mechanisms of action in a rat model. The rats have been treated with vehicle, Indo alone, combined treatment with Indo, and PIC at (5 mg/kg or 10 mg/kg), respectively. The rats were also treated with Indo and omeprazole. In our study, we found that PIC at both 5 and 10 mg/kg doses was effective by averting the rise in ulcer and lesion indices, acid production, and histological variations persuaded by Indo. Mechanistically, PIC significantly reduced lipid peroxidation product (MDA), increased the GSH content, and enhanced SOD and CAT activity. In addition, PIC exhibits a distinct reduction in the levels of inflammatory parameters (Cox-2, IL-6, TNF-α, and NFκB). Contrastingly, PIC augmented both mucin and PGE2 content. Moreover, PIC fostered angiogenesis by increasing the expression of proangiogenic factors (VEGF, bFGF, and PDGF). Overall, the above results suggest PIC exhibits a potential protective effect against Indo-induced gastric ulcers by the antioxidant, anti-inflammatory, and angiogenic mechanisms.
Collapse
|
6
|
Wang Z, Lu YL, Chen M, Xu HF, Zheng LR. Piceatannol alleviates glucolipotoxicity induced vascular barrier injury through inhibition of the ROS/NF-kappa B signaling pathway. Am J Transl Res 2022; 14:120-134. [PMID: 35173833 PMCID: PMC8829620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/25/2021] [Indexed: 06/14/2023]
Abstract
Vascular barrier dysfunction is considered as the initial and critical event in atherosclerosis progression. Recent studies have revealed that treatment with piceatannol (PIC) alleviates both acute and chronic responses to vascular injury. We investigated whether PIC treatment would have beneficial effects on glucolipotoxicity-induced endothelial barrier dysfunction. Target proteins of PIC were identified from several online databases. Then, we confirmed the effect of PIC on endothelial barrier function. PIC treatment mitigated the impairment of endothelial cell motility, adhesion and migration ability associated with high glucose/lipid stimulation. PIC stabilized cytoskeletal reorganization and expression of cell cytoskeletal associated proteins GTPase. PIC reversed changes in critical vascular junction proteins and thus preserved endothelial barrier function and permeability. Finally, we confirmed that reducing of nuclear factor kappa B (NF-κB)/p65 activation and elimination of reactive oxygen species (ROS) were involved in the protective effect of PIC against glucolipotoxicity-induced vascular barrier injury. We identify PIC as a promising therapeutic strategy for glucolipotoxicity-induced endothelial barrier injury.
Collapse
Affiliation(s)
- Zhen Wang
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou 310003, Zhejiang, China
| | - Yun-Long Lu
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou 310003, Zhejiang, China
| | - Miao Chen
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou 310003, Zhejiang, China
| | - Hong-Fei Xu
- Department of Cardiothoracic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou 310003, Zhejiang, China
| | - Liang-Rong Zheng
- Department of Cardiology, The First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou 310003, Zhejiang, China
| |
Collapse
|
7
|
Ahmad I, Hoda M. Molecular mechanisms of action of resveratrol in modulation of diabetic and non-diabetic cardiomyopathy. Pharmacol Res 2020; 161:105112. [PMID: 32758636 DOI: 10.1016/j.phrs.2020.105112] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 07/22/2020] [Indexed: 12/18/2022]
Abstract
Cardiomyopathy is among the major clinical manifestations of heart diseases that triggers malfunctioning of the cardiovascular system. Some of the major causal factors of cardiomyopathy includes myocardial ischemia, drug-toxicity, genetic aberrations, abnormal depositions of essential elements, and redox imbalance. Diabetes, being the major comorbid of cardiovascular diseases and vice versa, further contributes to the progression of cardiomyopathy. The molecular mechanisms of action suggest that oxidative stress is among the primary factors that triggers cascading impact on cardiomyopathy. Resveratrol, a phenolic antioxidant, has the potential to quench the excessive free radicals. It is a potent antioxidant supplement that may as well be a therapeutic molecule. The review focuses on the various molecular mechanisms of action that resveratrol potentiates in reversing or attenuating the progress of diabetic and non-diabetic cardiomyopathy triggered by wide range of factors. Additionally, resveratrol also tends to preserve the healthy heart from potential damage that may be triggered by oxidative stress.
Collapse
Affiliation(s)
- Irshad Ahmad
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Muddasarul Hoda
- Department of Biological Sciences, Aliah University, IIA/27, Newtown, Kolkata, 700160, India.
| |
Collapse
|
8
|
Frommeyer G, Wolfes J, Ellermann C, Kochhäuser S, Dechering DG, Eckardt L. Acute electrophysiologic effects of the polyphenols resveratrol and piceatannol in rabbit atria. Clin Exp Pharmacol Physiol 2020; 46:94-98. [PMID: 29956844 DOI: 10.1111/1440-1681.13005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 11/28/2022]
Abstract
The natural polyphenol resveratrol and its analogue piceatannol have various beneficial effects including antiarrhythmic properties. The aim of the present study was to examine potential electrophysiologic effects in an experimental whole-heart model of atrial fibrillation (AF). Simultaneous infusion of resveratrol (50 μmol/L) or piceatannol (10 μmol/L) in rabbit hearts resulted in an increase in atrial refractory period. Both agents induced a significant slowing of atrial conduction and of intrinsic heart rate. In both groups, a trend toward a reduction in AF and a regularization of AF was observed.
Collapse
Affiliation(s)
- Gerrit Frommeyer
- Clinic for Cardiology II - Electrophysiology, University Hospital of Münster, Münster, Germany
| | - Julian Wolfes
- Clinic for Cardiology II - Electrophysiology, University Hospital of Münster, Münster, Germany
| | - Christian Ellermann
- Clinic for Cardiology II - Electrophysiology, University Hospital of Münster, Münster, Germany
| | - Simon Kochhäuser
- Clinic for Cardiology II - Electrophysiology, University Hospital of Münster, Münster, Germany
| | - Dirk G Dechering
- Clinic for Cardiology II - Electrophysiology, University Hospital of Münster, Münster, Germany
| | - Lars Eckardt
- Clinic for Cardiology II - Electrophysiology, University Hospital of Münster, Münster, Germany
| |
Collapse
|
9
|
Abdelgawad IY, Grant MKO, Zordoky BN. Leveraging the Cardio-Protective and Anticancer Properties of Resveratrol in Cardio-Oncology. Nutrients 2019; 11:nu11030627. [PMID: 30875799 PMCID: PMC6471701 DOI: 10.3390/nu11030627] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 03/08/2019] [Accepted: 03/09/2019] [Indexed: 12/25/2022] Open
Abstract
Cardio-oncology is a clinical/scientific discipline which aims to prevent and/or treat cardiovascular diseases in cancer patients. Although a large number of cancer treatments are known to cause cardiovascular toxicity, they are still widely used because they are highly effective. Unfortunately, therapeutic interventions to prevent and/or treat cancer treatment-induced cardiovascular toxicity have not been established yet. A major challenge for such interventions is to protect the cardiovascular system without compromising the therapeutic benefit of anticancer medications. Intriguingly, the polyphenolic natural compound resveratrol and its analogs have been shown in preclinical studies to protect against cancer treatment-induced cardiovascular toxicity. They have also been shown to possess significant anticancer properties on their own, and to enhance the anticancer effect of other cancer treatments. Thus, they hold significant promise to protect the cardiovascular system and fight the cancer at the same time. In this review, we will discuss the current knowledge regarding the cardio-protective and the anticancer properties of resveratrol and its analogs. Thereafter, we will discuss the challenges that face the clinical application of these agents. To conclude, we will highlight important gaps of knowledge and future research directions to accelerate the translation of these exciting preclinical findings to cancer patient care.
Collapse
Affiliation(s)
- Ibrahim Y Abdelgawad
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Marianne K O Grant
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Beshay N Zordoky
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA.
| |
Collapse
|
10
|
Chang PC, Huang YC, Lee HL, Chang GJ, Chu Y, Wen MS, Chou CC. Inhomogeneous downregulation of I Na underlies piceatannol proarrhythmic mechanism in regional ischemia-reperfusion. PACING AND CLINICAL ELECTROPHYSIOLOGY: PACE 2018; 41:1116-1122. [PMID: 29928764 DOI: 10.1111/pace.13424] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 06/14/2018] [Accepted: 06/17/2018] [Indexed: 01/16/2023]
Abstract
BACKGROUND Piceatannol, a grape-derived polyphenol, has been linked to proarrhythmic properties by aggravating inhomogeneous conduction delay in the ischemia-reperfusion (IR) zone to enhance arrhythmogenic alternans in heart failure (HF) rabbits. The underlying molecular mechanisms of piceatannol-induced conduction disturbance were unclear in this model. METHODS HF was induced by 4 weeks' rapid ventricular pacing. IR injury was induced in vivo using a protocol of left coronary artery ligation and release. Left ventricular cardiomyocytes were isolated enzymatically for whole-cell patch-clamp studies. Piceatannol (10 μM) was administrated to test its inhibitory effect on sodium current (INa ). Immunoblots studies and immunoenzymological staining were conducted in tissues sampled from the IR and remote zones. RESULTS Peak INa density was less in failing cardiomyocytes than control cardiomyocytes. IR injury further reduces peak INa density in both groups. Piceatannol showed a greater INa inhibitory effect in HF than control cardiomyocytes. Western blots showed reduced NaV 1.5 protein expression in the HF group compared to the control group but no significant difference between remote and IR zones. Immunostaining showed that IR led to cytosolic redistribution of NaV 1.5, especially in failing hearts. CONCLUSIONS Downregulation of NaV 1.5 protein expression and reduced peak INa density are found in the failing hearts. Piceatannol exerts a greater inhibitory effect on peak INa in the failing cardiomyocytes than in the controls. IR injury further decreases peak INa density, which is more prominent in the failing hearts than in the control hearts.
Collapse
Affiliation(s)
- Po-Cheng Chang
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan.,Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Yu-Chang Huang
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Hui-Ling Lee
- Department of Anesthesia, Chang Gung Memorial Hospital, Taipei, Taiwan.,Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Gwo-Jyh Chang
- Graduate Institute of Clinical Medicine, Chang Gung University, Taoyuan, Taiwan.,Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Yen Chu
- Division of Thoracic Surgery, Chang Gung Memorial Hospital, Linkou.,Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Ming-Shien Wen
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan.,Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Chung-Chuan Chou
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei, Taiwan.,Chang Gung University College of Medicine, Taoyuan, Taiwan
| |
Collapse
|
11
|
Sheng A, Zhang Y, Li G, Zhang G. Inhibitory Effects of Honokiol on the Voltage-Gated Potassium Channels in Freshly Isolated Mouse Dorsal Root Ganglion Neurons. Neurochem Res 2017; 43:450-457. [PMID: 29177805 DOI: 10.1007/s11064-017-2440-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/17/2017] [Accepted: 11/22/2017] [Indexed: 01/06/2023]
Abstract
Voltage-gated potassium (KV) currents, subdivided into rapidly inactivating A-type currents (I A) and slowly inactivating delayed rectifier currents (I K), play a fundamental role in modulating pain by controlling neuronal excitability. The effects of Honokiol (Hon), a natural biphenolic compound derived from Magnolia officinalis, on KV currents were investigated in freshly isolated mouse dorsal root ganglion neurons using the whole-cell patch clamp technique. Results showed that Hon inhibited I A and I K in concentration-dependent manner. The IC50 values for block of I A and I K were 30.5 and 25.7 µM, respectively. Hon (30 µM) shifted the steady-state activation curves of I A and I K to positive potentials by 17.6 and 16.7 mV, whereas inactivation and recovery from the inactivated state of I A were unaffected. These results suggest that Hon preferentially interacts with the active states of the I A and I K channels, and has no effect on the resting state and inactivated state of the I A channel. Blockade on K+ channels by Hon may contribute to its antinociceptive effect, especially anti-inflammatory pain.
Collapse
Affiliation(s)
- Anqi Sheng
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yan Zhang
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Guang Li
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, 646000, China
| | - Guangqin Zhang
- Department of Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| |
Collapse
|
12
|
Barangi S, Hayes AW, Karimi G. The more effective treatment of atrial fibrillation applying the natural compounds; as NADPH oxidase and ion channel inhibitors. Crit Rev Food Sci Nutr 2017; 58:1230-1241. [PMID: 28925721 DOI: 10.1080/10408398.2017.1379000] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Atrial fibrillation (AF) is the most common cardiac arrhythmia that occurs because of several different risk factors, e.g., valvular heart disease, coronary artery disease, age ≥75 years, hypertension and diabetes mellitus. One key risk factor that results in AF, is oxidative stress. Evidence suggests that there is a correlation between oxidative processes and the genesis of AF. Oxidative stress occurs when the generation of reactive oxygen species (ROS) increase due to excessive activity of enzymes including NADPH oxidase (NOX) and xanthine oxidase; or its degradation decrease by dysfunctional antioxidant enzyme systems, such as superoxide dismutase (SOD), catalase and glutathione peroxidase (GPx). Afterwards, elevated ROS may shift ion channel activity to increase AF susceptibility. The outbreak of AF continues to grow. Unfortunately, current treatment strategies may have limited efficacy or adverse effects. On the other hand, the inhibition of ROS formation and alteration of ion channel activity could be important therapeutic targets for prevention or treatments of AF. Additionally, many studies have been shown that several natural compounds have the ability to inhibit NADPH oxidases directly. This review focuses on natural compounds which specially inhibit NOX isoforms and have direct effects on ion channels, suggesting these compounds can be helpful in AF treatment.
Collapse
Affiliation(s)
- Samira Barangi
- a Department of Pharmacodynamics and Toxicology , School of Pharmacy, Mashhad University of Medical Sciences , Mashhad , Iran
| | - A Wallace Hayes
- b Harvard University, Cambridge, MA, USA; Michigan State University , East Lansing , MI , USA
| | - Gholamreza Karimi
- a Department of Pharmacodynamics and Toxicology , School of Pharmacy, Mashhad University of Medical Sciences , Mashhad , Iran.,c Pharmaceutical Research Center , Mashhad University of Medical Sciences , Mashhad , Iran
| |
Collapse
|
13
|
Divergent antiarrhythmic effects of resveratrol and piceatannol in a whole-heart model of long QT syndrome. Int J Cardiol 2017; 243:233-238. [PMID: 28606656 DOI: 10.1016/j.ijcard.2017.06.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 05/16/2017] [Accepted: 06/01/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND The polyphenol resveratrol and its metabolite piceatannol have beneficial health effects including antiarrhythmic properties in ischemia/reperfusion. The objective of this study was to determine potential antiarrhythmic effects in acquired long-QT-syndrome (LQTS). METHODS AND RESULTS 26 rabbit hearts were isolated and Langendorff-perfused. The IKr-blocker sotalol (100μM) was infused to mimic LQTS-2. Hearts were assigned to two groups. Sotalol significantly prolonged action potential duration (APD90) and QT-interval in both groups (group 1:APD90: +18ms, p<0.01;QT: +59ms, p<0.01; group 2: APD90: +22ms, p<0.01; QT: +30ms, p<0.01) and also significantly increased dispersion of repolarization (group 1: +21ms, p<0.01; group 2: +23ms, p<0.01). Thereafter, hearts were additionally perfused either with resveratrol (50μM, group 1, n=14) or with piceatannol (10μM, group 2, n=12). Administration of resveratrol significantly reduced APD90 (-29ms, p<0.01), QT-interval(-60ms, p<0.01) and dispersion of repolarization (-26ms, p<0.01). In contrast, piceatannol did not significantly alter APD90 (±0ms) but shortened QT-interval (-19ms, p<0.01) and increased dispersion of repolarization (+15ms, p<0.01). With sotalol, 7 of 14 bradycardic, AV-blocked hearts in group 1 and 8 of 12 in group 2 showed early afterdepolarizations (EAD) after lowering potassium concentration (p<0.01each). Polymorphic ventricular tachycardia (PVT) occurred in 5 of 14 (p<0.05) and 4 of 12 hearts (p=0.09) with a total number of 42 (p<0.05) and 44 episodes (p=0.07), respectively. Additional infusion of resveratrol reduced EAD (2 of 14, p=0.11) and PVT (1 of 14 hearts, p=0.16, 3 episodes, p<0.05). Piceatannol did not suppress EAD or TdP (EAD in 9 of 12 and TdP in 7 of 12 hearts,50 episodes). CONCLUSION Resveratrol showed beneficial antiarrhythmic properties in acquired LQTS. Underlying mechanism is a substantial decrease dispersion of repolarization leading to a suppression of triggered activity.
Collapse
|
14
|
Surh YJ, Na HK. Therapeutic Potential and Molecular Targets of Piceatannol in Chronic Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 928:185-211. [PMID: 27671818 DOI: 10.1007/978-3-319-41334-1_9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Piceatannol (3,3',4,5'-tetrahydroxy-trans-stilbene; PIC) is a naturally occurring stilbene present in diverse plant sources. PIC is a hydroxylated analog of resveratrol and produced from resveratrol by microsomal cytochrome P450 1A11/2 and 1B1 activities. Like resveratrol, PIC has a broad spectrum of health beneficial effects, many of which are attributable to its antioxidative and anti-inflammatory activities. PIC exerts anticarcinogenic effects by targeting specific proteins involved in regulating cancer cell proliferation, survival/death, invasion, metastasis, angiogenesis, etc. in tumor microenvironment. PIC also has other health promoting and disease preventing functions, such as anti-obese, antidiabetic, neuroptotective, cardioprotective, anti-allergic, anti-aging properties. This review outlines the principal biological activities of PIC and underlying mechanisms with special focus on intracellular signaling molecules/pathways involved.
Collapse
Affiliation(s)
- Young-Joon Surh
- Department of Molecular Medicine and Biopharmaceutical Sciences, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, South Korea.
| | - Hye-Kyung Na
- Department of Food and Nutrition, College of Human Ecology, Sungshin Women's University, Seoul, 142-732, South Korea.
| |
Collapse
|
15
|
Hernandez-Cascales J. Resveratrol enhances the inotropic effect but inhibits the proarrhythmic effect of sympathomimetic agents in rat myocardium. PeerJ 2017; 5:e3113. [PMID: 28382232 PMCID: PMC5376116 DOI: 10.7717/peerj.3113] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 02/21/2017] [Indexed: 01/01/2023] Open
Abstract
Background Resveratrol is a cardioprotective agent with known antiarrhythmic effects that has recently been shown to inhibit phosphodiesterase (PDE) enzyme activity. Thus, it is possible that resveratrol increases the inotropic effect of sympathomimetic agents, as PDE inhibitors do but, unlike other PDE inhibitors, its effect may not be accompanied by proarrhythmia due to its antiarrhythmic action. This work is aimed to test this hypothesis. Methods This is an “in vitro” concentration-response relationship study. The effects of noradrenaline, tyramine and isoproterenol, alone or in combination with either resveratrol or with the typical PDE inhibitor 3-isobutylmethylxantine (IBMX), were studied in electrically driven strips of right ventricle or in the spontaneously beating free wall of the right ventricle of rat heart in order to investigate inotropic or proarrhythmic effects respectively. Also, the effects of resveratrol or IBMX on the sinoatrial node rate were examined in the isolated right atria of rat heart. Results Resveratrol (10 µM and 100 µM) produces a leftward shift in the concentration-response curves for the contractile effects of noradrenaline, tyramine or isoproterenol and reduces the –log EC50 values of these three agents. IBMX produces similar effects. The spontaneous ventricular beating rate was increased by all three compounds, an effect that was further enhanced by the addition of IBMX. In contrast, resveratrol (100 µM) abolished the effects of these sympathomimetic agents on the ventricular rate. Resveratrol (1–100 µM) had no effect on the sinoatrial node rate, while IBMX produce a concentration dependent sinoatrial tachycardia. Discussion Taken together, the finding, indicate that resveratrol, like the PDE inhibitor IBMX enhances the contractile effects of sympathomimetic agents but, in contrast to IBMX, it does not enhance their proarrhythmic effect or produce sinoatrial tachycardia. This is most probably consequence of the antiarrhythmic effect of resveratrol which protect against the proarrhythmic effects resulting from PDE inhibition.
Collapse
Affiliation(s)
- Jesús Hernandez-Cascales
- Department of Pharmacology, Faculty of Medicine, University of Murcia , Espinardo-Murcia , Spain
| |
Collapse
|
16
|
Limited beneficial effects of piceatannol supplementation on obesity complications in the obese Zucker rat: gut microbiota, metabolic, endocrine, and cardiac aspects. J Physiol Biochem 2016; 72:567-82. [PMID: 26792656 DOI: 10.1007/s13105-015-0464-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/28/2015] [Indexed: 12/13/2022]
|
17
|
Tang YL, Chan SW. A Review of the Pharmacological Effects of Piceatannol on Cardiovascular Diseases. Phytother Res 2014; 28:1581-8. [DOI: 10.1002/ptr.5185] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 05/13/2014] [Accepted: 05/15/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Yee-Ling Tang
- Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hong Kong China
| | - Shun-Wan Chan
- Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hong Kong China
- Food Safety and Technology Research Centre, Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hong Kong China
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology, Department of Applied Biology and Chemical Technology; The Hong Kong Polytechnic University; Hong Kong China
| |
Collapse
|
18
|
Piceatannol facilitates conduction block and ventricular fibrillation induction in ischemia-reperfused rabbit hearts with pacing-induced heart failure. Int J Cardiol 2014; 171:250-8. [DOI: 10.1016/j.ijcard.2013.12.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/21/2013] [Accepted: 12/14/2013] [Indexed: 11/21/2022]
|
19
|
Koolaji N, Abu-Mellal A, Tran VH, Duke RK, Duke CC. Synthesis of C- and O-prenylated tetrahydroxystilbenes and O-prenylated cinnamates and their action towards cancer cells. Eur J Med Chem 2013; 63:415-22. [DOI: 10.1016/j.ejmech.2013.02.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 02/08/2013] [Accepted: 02/14/2013] [Indexed: 01/07/2023]
|
20
|
Mechanism of salutary effects of astringinin on rodent hepatic injury following trauma-hemorrhage: Akt-dependent hemeoxygenase-1 signaling pathways. PLoS One 2011; 6:e25907. [PMID: 22022464 PMCID: PMC3191154 DOI: 10.1371/journal.pone.0025907] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 09/13/2011] [Indexed: 12/21/2022] Open
Abstract
Astringinin can attenuate organ injury following trauma-hemorrhage, the mechanism remains unknown. Protein kinase B/hemeoxygenase-1 (Akt/HO-1) pathway exerts potent anti-inflammatory effects in various tissues. The aim of this study is to elucidate whether Akt/HO-1 plays any role in astringinin-mediated attenuation of hepatic injury following trauma-hemorrhage. For study this, male Sprague-Dawley rats underwent trauma-hemorrhage (mean blood pressure 35–40 mmHg for 90 min) followed by fluid resuscitation. A single dose of astringinin (0.3 mg/kg body weight) with or without a PI3K inhibitor (wortmannin) or a HO antagonist (chromium-mesoporphyrin) was administered during resuscitation. Various parameters were measured at 24 h post-resuscitation. Results showed that trauma-hemorrhage increased plasma aspartate and alanine aminotransferases (AST and ALT) concentrations and hepatic myeloperoxidase activity, cytokine induced neutrophil chemoattractant (CINC)-1, CINC-3, intercellular adhesion molecule-1, and interleukin-6 levels. These parameters were significantly improved in the astringinin-treated rats subjected to trauma-hemorrhage. Astringinin treatment also increased hepatic Akt activation and HO-1 expression as compared with vehicle-treated trauma-hemorrhaged rats. Co-administration of wortmannin or chromium-mesoporphyrin abolished the astringinin-induced beneficial effects on post-resuscitation pro-inflammatory responses and hepatic injury. These findings collectively suggest that the salutary effects of astringinin administration on attenuation of hepatic injury after trauma-hemorrhage are likely mediated via Akt dependent HO-1 up-regulation.
Collapse
|
21
|
Scutellarin Blocks Sodium Current in Freshly Isolated Mouse Hippocampal CA1 Neurons. Neurochem Res 2011; 36:947-54. [DOI: 10.1007/s11064-011-0426-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 02/12/2011] [Indexed: 11/27/2022]
|
22
|
Favorable effects of resveratrol on sympathetic neural remodeling in rats following myocardial infarction. Eur J Pharmacol 2010; 649:293-300. [PMID: 20869962 DOI: 10.1016/j.ejphar.2010.09.036] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 07/12/2010] [Accepted: 09/14/2010] [Indexed: 12/29/2022]
Abstract
Oxidative stress and inflammatory response induced by myocardial infarction play important roles in the development of sympathetic neural remodeling. The present study was designed to investigate whether resveratrol can improve sympathetic neural remodeling and hence cause less arrhythmias via its anti-oxidant and anti-inflammatory effects. Male Sprague Dawley rats were randomly assigned to either vehicle or resveratrol (1 mg/kg) treatment for 4 weeks post myocardial infarction. Another group of sham operated rats served as controls. Cardiac electrophysiology examination was performed to evaluate the severity of ventricular arrhythmias. Sympathetic neural remodeling characterized by heterogeneous nerve sprouting and sympathetic hyperinnervation was assessed by immunohistochemistry study. Western blotting and ELISA were used to evaluate inflammatory responses and oxidative stress was also quantified. Resveratrol treatment resulted in less episodes of inducible ventricular arrhythmias which was closely associated with attenuated sympathetic neural remodeling (P<0.001, respectively). Decreased nerve growth factor (NGF) expression was also observed in resveratrol treated rats in the peri-infarct area at 4 weeks after myocardial infarction (P<0.001). Interestingly, beneficial effects of resveratrol were also associated with less inflammatory responses and oxidative stress. Our data indicated that resveratrol can suppress sympathetic neural remodeling process after myocardial infarction via attenuated inflammatory responses and oxidative stress, which in turn leads to less inducibility of ventricular arrhythmias.
Collapse
|
23
|
Veenman L, Alten J, Linnemannstöns K, Shandalov Y, Zeno S, Lakomek M, Gavish M, Kugler W. Potential involvement of F0F1-ATP(synth)ase and reactive oxygen species in apoptosis induction by the antineoplastic agent erucylphosphohomocholine in glioblastoma cell lines : a mechanism for induction of apoptosis via the 18 kDa mitochondrial translocator protein. Apoptosis 2010; 15:753-68. [PMID: 20107899 PMCID: PMC3128697 DOI: 10.1007/s10495-010-0460-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Erucylphosphohomocholine (ErPC3, Erufosine) was reported previously to induce apoptosis in otherwise highly apoptosis-resistant malignant glioma cell lines while sparing their non-tumorigenic counterparts. We also previously found that the mitochondrial 18 kDa Translocator Protein (TSPO) is required for apoptosis induction by ErPC3. These previous studies also suggested involvement of reactive oxygen species (ROS). In the present study we further investigated the potential involvement of ROS generation, the participation of the mitochondrial respiration chain, and the role of the mitochondrial F(O)F(1)-ATP(synth)ase in the pro-apoptotic effects of ErPC3 on U87MG and U118MG human glioblastoma cell lines. For this purpose, cells were treated with the ROS chelator butylated hydroxyanisole (BHA), the mitochondrial respiration chain inhibitors rotenone, antimycin A, myxothiazol, and the uncoupler CCCP. Also oligomycin and piceatannol were studied as inhibitors of the F(O) and F(1) subunits of the mitochondrial F(O)F(1)-ATP(synth)ase, respectively. BHA was able to attenuate apoptosis induction by ErPC3, including mitochondrial ROS generation as determined with cardiolipin oxidation, as well as collapse of the mitochondrial membrane potential (Deltapsi(m)). Similarly, we found that oligomycin attenuated apoptosis and collapse of the Deltapsi(m), normally induced by ErPC3, including the accompanying reductions in cellular ATP levels. Other inhibitors of the mitochondrial respiration chain, as well as piceatannol, did not show such effects. Consequently, our findings strongly point to a role for the F(O) subunit of the mitochondrial F(O)F(1)-ATP(synth)ase in ErPC3-induced apoptosis and dissipation of Deltapsi(m) as well as ROS generation by ErPC3 and TSPO.
Collapse
Affiliation(s)
- Leo Veenman
- Department of Molecular Pharmacology, Rappaport Family Institute for Research in the Medical Sciences, Technion-Israel Institute of Technology, P.O. Box 9649, Bat-Galim, 31096 Haifa, Israel
| | - Julia Alten
- Abteilung Pädiatrie I, Zentrum Kinderheilkunde und Jugendmedizin, Universitätsmedizin Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
| | - Karen Linnemannstöns
- Abteilung Pädiatrie I, Zentrum Kinderheilkunde und Jugendmedizin, Universitätsmedizin Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
| | - Yulia Shandalov
- Department of Molecular Pharmacology, Rappaport Family Institute for Research in the Medical Sciences, Technion-Israel Institute of Technology, P.O. Box 9649, Bat-Galim, 31096 Haifa, Israel
| | - Sivan Zeno
- Department of Molecular Pharmacology, Rappaport Family Institute for Research in the Medical Sciences, Technion-Israel Institute of Technology, P.O. Box 9649, Bat-Galim, 31096 Haifa, Israel
| | - Max Lakomek
- Abteilung Pädiatrie I, Zentrum Kinderheilkunde und Jugendmedizin, Universitätsmedizin Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
| | - Moshe Gavish
- Department of Molecular Pharmacology, Rappaport Family Institute for Research in the Medical Sciences, Technion-Israel Institute of Technology, P.O. Box 9649, Bat-Galim, 31096 Haifa, Israel
| | - Wilfried Kugler
- Abteilung Pädiatrie I, Zentrum Kinderheilkunde und Jugendmedizin, Universitätsmedizin Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
| |
Collapse
|
24
|
Lin HS, Tringali C, Spatafora C, Wu C, Ho PC. A simple and sensitive HPLC-UV method for the quantification of piceatannol analog trans-3,5,3',4'-tetramethoxystilbene in rat plasma and its application for a pre-clinical pharmacokinetic study. J Pharm Biomed Anal 2009; 51:679-84. [PMID: 19836182 DOI: 10.1016/j.jpba.2009.09.024] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2009] [Revised: 09/04/2009] [Accepted: 09/17/2009] [Indexed: 01/03/2023]
Abstract
A simple and sensitive HPLC-UV method was developed and validated for the quantification of piceatannol analog trans-3,5,3',4'-tetramethoxystilbene (M-PIC) in rat plasma. Following protein precipitation with three volumes of acetonitrile, the analytes were separated on a RP-HPLC column, which was protected by a guard column through gradient delivery of a mixture of acetonitrile-water at 40 degrees C. The UV absorbance at 325nm was recorded to quantify M-PIC. The retention time of M-PIC and trans-3,5-dimethoxystilbene (internal standard) was 7.4 and 8.4min, respectively. The calibration curves were linear (R(2)>0.9989) with a lower limit of quantification of 15ng/ml. The intra- and inter-day precisions, in terms of RSD, were all lower than 7.5%. The average analytical recovery ranged from 97.0 to 104.3% while the average absolute recovery ranged from 101.8 to 105.0%. This reliable HPLC method was subsequently applied to assess the pharmacokinetic profile of M-PIC in Sprague-Dawley rats using 2-hydroxypropyl-beta-cyclodextrin as a dosing vehicle. The terminal elimination half-life (t(1/2lambdaz)) and clearance (Cl) of M-PIC were 313+/-20min and 33.1+/-3.9ml/min/kg, respectively; and its absolute oral bioavailability was as high as 50.7+/-15.0%. M-PIC appeared to have a favorable pharmacokinetic profile and further pharmacological investigation on this phyto-stilbene was warranted.
Collapse
Affiliation(s)
- Hai-Shu Lin
- Department of Pharmacy, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singapore.
| | | | | | | | | |
Collapse
|